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A crossed loop for a weight.
Also known as: Drachm sign, Apothecary drachm
The apothecary symbol for the dram, a unit of the pre-metric pharmaceutical weight system.
A looped figure resembling a cursive letter with a stroke crossing its stem, written before the quantity in Roman numerals.
The two signs differ only in where a stroke crosses, between units differing by a factor of three.